Getting Started With the Web Interface
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5.3.3 View Sensor Graphs
The OpenComms EM sensor data may be viewed in graphic format, along with the sensor’s upper and
lower alarm limits, as described in 5.3.1 - Configure Sensors.
The OpenComms EM stores up to 1,440 data samples for each sensor. Sensor data samples can be
stored at intervals of 1 minute, 5 minutes, 10 minutes or 15 minutes. (To change the data sample
rate, see 5.7.3 - Data Presentation.)
These sample rates correspond to 24 hours of data samples collected at 1-minute intervals, 5 days for
5-minute intervals, 10 days for 10-minute intervals and 15 days for 15-minute intervals.
Sensor data samples are lost when the sensor is disconnected from a port or when the unit is shut
down or loses power. You can use SNMP to sample sensor data at a different rate or to store larger
amounts of data. (To activate SNMP traps, see 5.5.3 - SNMP Trap Alerts Setup. To set up SNMP
properties, see 5.7.2 - SNMP Information.)
To access the Sensor Graphs window, log in (see 5.1 - Open the Web Interface and Log In) and:
• Click on the Sensors tab at the top of the Web interface, as shown below.
• Choose a sensor from either of two lists on the left side of the window, as shown above:
a. Click on a link in the connected sensors list, or
b. Click on the Down arrow to the right of the drop-down list and select a name from the list.
• On the right side of the window, click on the Graph button, as shown above. The right side of the
window shows a graph of current sensor data, upper and lower limits, as in the example in
Figure 6.
Sensors tab
Graph
button
a. Connected
sensors list
OR
b. Drop-down
list
Select a sensor
from either list:
